2154623
Descripción
Test por Freddy Bueno, actualizado hace más de 1 año
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Creado por Freddy Bueno
hace más de 9 años
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Pregunta 1
Pregunta
Welding is a joining process that by definition requires the application of:
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both heat and pressure
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either heat or pressure
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both heat and filler metal
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both pressure and filler metal
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all of the above
Pregunta 2
Pregunta
In arc welding, the electric arc is intensely hot with temperatures exceeding:
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20,000 Degrees C
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30,000 Degrees C
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33,000 Degrees C
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40,000 Degrees C
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50,000 Degrees C
Pregunta 3
Pregunta
The most common gas used with gas shielded flux cored arc welding is:
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Pure argon
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Pure helium
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75% Ar-25% CO2
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Argon with 10% Hydrogen
Pregunta 4
Pregunta
The technique used for semi-automatic welding with gas shielded flux cored arc welding is:
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Drag (backhand)
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Push (forehand)
Pregunta 5
Pregunta
Welding equipment for gas shielded flux cored arc welding is essentially the same as for gas metal arc welding.
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- True
- False
Pregunta 6
Pregunta
Gas shielded flux cored wires with basic ingredients in the core are ideally suited for out-of-position welding
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- True
- False
Pregunta 7
Pregunta
Constant voltage power source are preferred for SMAW
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- True
- False
Pregunta 8
Pregunta
Large diameter electrodes are preferred for welding the root passes in V grooves and for out-of-position welds
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- True
- False
Pregunta 9
Pregunta
Constant voltage power source are generally used for GMAW.
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- True
- False
Pregunta 10
Pregunta
In the submerged arc welding process, granular flux is placed on the unleaded seam behind the consumable electrode.
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- True
- False
Pregunta 11
Pregunta
Fused fluxes are prone to moisture pick up
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- True
- False
Pregunta 12
Pregunta
The source of heat in the resistance welding process is:
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An electric arc
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External pressure
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Resistance of the copper electrode to electron flow
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Electrical resistance of the workpieces
Pregunta 13
Pregunta
Which of the following arc welding processes is non-consumable electrode type?
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GTAW
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SMAW
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GMAW
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FCAW
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SAW
Pregunta 14
Pregunta
Which of the following arc welding processes is non-consumable electrode type?
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SMAW
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GMAW
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FCAW
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SAW
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PAW
Pregunta 15
Pregunta
The electron beam welding process results in:
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wide, deep-penetrating welds and heat-affected zones.
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narrow, deep-penetrating welds and heat-affected zones.
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Narrow, shallow-penetrating welds and heat-affected zones.
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wide, shallow-penetrating welds and heat-affected zones.
Pregunta 16
Pregunta
In thermite welding, the reaction from which the required heat and molten metal is obtained is called:
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Exothermic
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Duo thermic
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Interthermic
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endothermic
Pregunta 17
Pregunta
In electroslag welding, the usual cooling medium used on the copper shoes is:
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Dry ice
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Air
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Oil
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Water
Pregunta 18
Pregunta
A welding arc consist of a:
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Low current and a high voltage
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High current and a low voltage
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High current and a high voltage
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Low current and a low voltage
Pregunta 19
Pregunta
The heat of the welding arc is used to:
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Locally melt the base material and filler material to create fusion upon solidification
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Heat the base material and melt the filler material to form a surface bond between the two materials
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Heat the materials to be jointed before the application of pressure
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Promote a metallurgical reaction resulting in the bonding of the adjoining materials
Pregunta 20
Pregunta
Welding using the GTAW process with current set to DCEN (Direct Current Electrode Negative) results in:
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30% arc heat at the electrode and 70% arc heat at the work.
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70% arc heat at the electrode and 30% arc heat at the work
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40% arc heat at the electrode and 60% arc heat at the work
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60% arc heat at the electrode and 40% arc heat tat the work
Pregunta 21
Pregunta
The function of the ingredients in the electrode coating of SMAW electrodes is to:
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Provide a gas shield, slag covering, scavengers, arc stabilization and additional alloying elements.
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React with the base metal to assist in the weld fusion
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Remove rust, mill scale and other contaminants from the surface of the joint.
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Counteract the effects of arc blow.
Pregunta 22
Pregunta
The temperature for holding low-hydrogen electrodes is:
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30 Degrees C
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90 Degrees C
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120 Degrees C
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430 Degrees C
Pregunta 23
Pregunta
The GMAW Process uses _______________ To shield the molten weld metal from the atmosphere:
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A slag system
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External shielding gas
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A blanket of flux
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a vacuum chamber
Pregunta 24
Pregunta
Flux cored arc welding is a welding process usually used in the semi-automatic mode consisting of:
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A constant current power supply, a continuos wire feeder, a welding gun, and a continuos solid filler metal electrode
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A constant voltage power supply, a continuos speed wire feeder, a welding gun, and a continuos filler metal electrode with a hollow core containing flux and other ingredients
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A constant current power supply, a variable speed wire feeder, a welding gun, and a continuos filler metal electrode with a hollow core containing flux and other ingredients
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A constant voltage power supply, a continuos speed wire feeder, a welding gun, and a continuos filler metal electrode with a hollow core containing primarily metal powder
Pregunta 25
Pregunta
For a flat weld profile and good penetration profile using the metal cored arc welding process (MCAW), a travel angle of:
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20 Degrees using a drag technique should be used
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10 Degrees using a drag technique should be used
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15 Degrees using a push technique should be used
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30 Degrees using a push technique should be used
Pregunta 26
Pregunta
SAW fluxes:
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Are classified, each with its own separate designation
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Are not classified. Only the wire is classified
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Are classified in conjunction with the welding wire forming a flux-wire designation
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Are all classified with EM12K wire. Used with other wires would require companies to perform testing to verify desired properties
Pregunta 27
Pregunta
A major advantage of the electron beam welding process is:
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Low equipment cost and ease of use
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High speed welding of thin materials
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Fit-up of joints does not have to be precise
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Full penetration welds on thick materials in one pass
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